James a



A (N0 Model.)

' J. A; MULLEN.

FILTER.

Patented Aug. 31, 1897.

A TTOHNE Y.

UNrrEn STATES APnrniar @Fi-ica JAMES MULLEN, OF NEV YORK, N. Y.

FILTER.

SPECIFICATION forming part of Letters Patent N o. 589,159, dated August 31, .1897.

Application led November 19, 1896. Serial No. 612,715. (No model.)

To all whom it may cncer/'72,:

Be it known that I, JAMES A. MULLEN, a citizen of the-United States, residing at New York, in the county of New York and State of New York, have invented cert-ain new and useful Improvelnents in Filters; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art toWhieh it appertains to make and use the same.

This invention relates to improvements in filters, and has more particular relation to cleaning devices for the same.

'lhe invention consists of certain novel constructions, combinations, and arrangements of parts, all of which Will be hereinafter more fully described and claimed.

In the accompanying drawings, forming part ofthis specification, Figure l represents a central vertical section through a filter embodying my invention. Fig. 2 represents an enlarged detail perspective View of the cleaning-knife and its operating-shank. Fig. 3 represents a central Vertical section through a modified form of my invention; and Fig. 4 represents an enlarged detail perspective View, taken from below, of the filtering-stone and its mounting embodied in this form.

A in the drawings represents the containing-casing, B the filtering-stone, and C thev scraping-knife'. Said casing A may be of any desired material and construction, but is preferablymade, as shown in the drawings, with a conical bottom d, hat-ing an outlet d and a conical top or cover a2, having a screwthreaded attaching-flange a3 andan aperture a4. The said casing A isalso provided with an inlet a5 and a sediment-outlet a6. porous stone or iilterer B is applied in said casing A above the conical bottom a, with its upper surface j ust below the sediment-outlet4 a6. The scraping-knife'Cpomprises a single blade o, extending diametrically across the upper surface of said stone, and ay vertical operating-shank c', connected to said blade and extending up through a suitable packing a7, mounted in the aperture a4in the cover a2 of the casing. The upper end of said shank c is provided with an operating'handle or grip cvwhereby said knife c may be rotated over the upper surface of the filtering-stone and scrape all sediment and accumulations The from the same, causing them to discharge through thel outlet as.' Said outlet a6 is providedfwith a suitable cork orfvali'e a8, which is normally closed, so as to prevent the escapeof the .contents ofthe casing'A.

VIt will be observed. from thevforegoing description that my improved iilterer may be instantly cleaned by simply grasping the'handie giving the same a slight rotation, and opening the valve as, thus permitting the ac- -cu'mulations that have been scraped from the upper surface of the filtering-stone to escape with the Water in the casing A through the outlet a6. VA little fresh water introduced into the casing through the inlet a5 will thoroughly wash out all the sediment and leave the interior of the filter, as Well as the upper surface of the filtering-stone, clean and sweet. Sai'd'casing A may be supported in any desired position by any sui-table supportingbase. -I

In the modified form of my invention shown in Figs. 3 and 4 the casing A is substantially the same shape asr the casing A, and is provided with a closing-cover a9, secured to said casing by'suitable screw-threads al@ a, formed on said cover and said casing, respectively. The said cover ai is formed With an inlet ctan'd 'a sediment-outlet cl3, similar to the outlet d6. VThefknife H is of practically the saine construction as the knife c and is mounted rigidly in positionby a plurality of pendent arms h, connecting the same With the cover d. The filtering-stone I is rotatably mounted wi/thin said casing A by a perforated pipe or tube z', that is connected to the bottom of said filtering-stone by a spider .vi/ The said tube passes through a suitable packing in the lower conical end of the casing A' and is provided at its lower end with 'an operating-handle 2, by means of which said tube may be raised to raise the filteringstone 'against theknife ll, and thus clean said stone by rotating the same against said knife. The action in this case is the same as that heretofore described, with the exception that the knife is held stationary and the filteringstone is rotated. Y

Having thus. described my invention, what I claim as new, and desire to secure byLetters Patent, is

l. In a filter, the combination with a suit- IOO able supportlngrcasing having an inlet and an outlet, of a filteringistone mounted in said casing between said inlet and outlet, and a scraping-knife mounted in said casing so as to extend entirely across the diameter of one end of the stone to scrape the same, and a sediment-outlet connected ,to said casingv above the filtering-stone, substantially as described.

2. In a iilter, the combination with a suitable casinghaving an inlet at its upper end, of aknife rigidly mounted in said casing, a filtering-stone, a tube supporting said stone and extending through the bottom of said casing, and a handle mounted on said tube for rotating the same to canse the filtering-stone to engage the under side of the knife, and scrape the sediment therefrom` and means for withdrawing said sediment from above the stone, substantially as described.

3. In a filter, the combination with a suitable. casing, of a closing-top secured to the same, a scraping-knife pendent from said top and extending across the entire diameter of said casing, a movable filtering-stone mounted in said casing, a perforated tube supporting, said stone and extending through a suitable packing in the bottom of the casing, and a handle mounted on the lower end of said tube for rotating the same to cause a movement of the stone and the scraping-knife to scrape the sediment therefrom, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

JAMES A. MULLEN. \Vit1iesses BENJ. F. CRUMP, FRANCIS LYNCH. 

